Java后端用EL表达式改进JSP_java

package com.web;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
@WebServlet("/demo1")
public class ServletDemo1 extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      //添加数据
        List list=new ArrayList<>();
        list.add("zhangSan1");
        list.add("zhangSan2");
        list.add("zhangSan3");
        list.add("zhangSan4");
        list.add("zhangSan5");
        System.out.println(list);
        //2、存储到request域中,可以转发到jsp页面中从而使用EL表达式
        request.setAttribute("lists", list);
        //3、转发到el-demo.jsp
request.getRequestDispatcher("/el-demo.jsp").forward(request, response);
 
 
    }
}

<%@ page language="java" contentType="text/html; charset=utf-8"
         isELIgnored="false"
         pageEncoding="utf-8" %>
 


 
    
    


${lists}